DEVNAME(3) BSD Programmer's Manual DEVNAME(3)NAMEdevname - get device name
SYNOPSIS
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
char *
devname(dev_t dev, mode_t type);
DESCRIPTION
The devname() function returns a pointer to the name of the block or
character device in /dev with a device number of dev, and a file type
matching the one encoded in type which must be one of S_IFBLK or S_IFCHR.
If no device matches the specified values, or no information is avail-
able, NULL is returned.
Device names are found by searching /var/run/dev.db which is created by
dev_mkdb(8) during system boot. The information returned does not re-
flect changes made in /dev after dev_mkdb(8) was run.
The traditional display for applications when no device is found is the
string ``??''.
FILES
/var/run/dev.db Device database file.
SEE ALSOstat(2), dev_mkdb(8)HISTORY
The devname function call appeared in 4.4BSD.
4.4BSD June 4, 1993 1